128 lines
3.7 KiB
ReStructuredText
128 lines
3.7 KiB
ReStructuredText
.. _bluetooth-overview:
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Overview
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########
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.. contents::
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:local:
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:depth: 2
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Since its inception, Zephyr has had a strong focus on Bluetooth and, in
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particular, on Bluetooth Low Energy (BLE). Through the contributions of
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several companies and individuals involved in existing open source
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implementations of the Bluetooth specification (Linux's BlueZ) as well as the
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design and development of BLE radio hardware, the protocol stack in Zephyr has
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grown to be mature and feature-rich, as can be seen in the section below.
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Supported Features
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******************
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Zephyr comes integrated with a feature-rich and highly configurable
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Bluetooth stack.
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* Bluetooth v5.3 compliant
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* Highly configurable
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* Features, buffer sizes/counts, stack sizes, etc.
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* Portable to all architectures supported by Zephyr (including big and
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little endian, alignment flavors and more)
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* Support for all combinations of Host and Controller builds:
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* Controller-only (HCI) over UART, SPI, USB and IPC physical transports
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* Host-only over UART, SPI, and IPC (shared memory)
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* Combined (Host + Controller)
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* Bluetooth-SIG qualified
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* Controller on Nordic Semiconductor hardware
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* Conformance tests run regularly on all layers
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* Bluetooth Low Energy Controller support (LE Link Layer)
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* Unlimited role and connection count, all roles supported
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* All v5.3 specification features supported (except a few minor items)
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* Concurrent multi-protocol support ready
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* Intelligent scheduling of roles to minimize overlap
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* Portable design to any open BLE radio, currently supports Nordic
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Semiconductor nRF51 and nRF52, as well as proprietary radios
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* Supports little and big endian architectures, and abstracts the hard
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real-time specifics so that they can be encapsulated in a hardware-specific
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module
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* Support for Controller (HCI) builds over different physical transports
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* Bluetooth Host support
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* Generic Access Profile (GAP) with all possible LE roles
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* Peripheral & Central
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* Observer & Broadcaster
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* Multiple PHY support (2Mbit/s, Coded)
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* Extended Advertising
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* Periodic Advertising (including Sync Transfer)
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* GATT (Generic Attribute Profile)
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* Server (to be a sensor)
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* Client (to connect to sensors)
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* Enhanced ATT (EATT)
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* GATT Database Hash
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* GATT Multiple Notifications
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* Pairing support, including the Secure Connections feature from Bluetooth 4.2
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* Non-volatile storage support for permanent storage of Bluetooth-specific
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settings and data
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* Bluetooth Mesh support
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* Relay, Friend Node, Low-Power Node (LPN) and GATT Proxy features
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* Both Provisioning roles and bearers supported (PB-ADV & PB-GATT)
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* Foundation Models included
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* Highly configurable, fits as small as 16k RAM devices
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* IPSP/6LoWPAN for IPv6 connectivity over Bluetooth LE
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* IPSP node sample application
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* Basic Bluetooth BR/EDR (Classic) support
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* Generic Access Profile (GAP)
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* Logical Link Control and Adaptation Protocol (L2CAP)
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* Serial Port emulation (RFCOMM protocol)
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* Service Discovery Protocol (SDP)
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* Clean HCI driver abstraction
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* 3-Wire (H:5) & 5-Wire (H:4) UART
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* SPI
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* Local controller support as a virtual HCI driver
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* Verified with multiple popular controllers
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* LE Audio in Host and Controller
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* Isochronous channels
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* Full Host support
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* Initial Controller support
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* Generic Audio Framework
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* Basic Audio Profile
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* Unicast server and client
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* Broadcast source and sink
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* Broadcast assistant
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* Scan delegator
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* Common Audio Profile
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* Acceptor
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* Volume Control Profile, Microphone Control Profile
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* Call Control Profile, Media Control Profile
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* Coordinated Set Identification Profile
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